Allen-Bradley 2711-B5A3 PanelView 550 HMI Display

Allen-Bradley PanelView 550 2711-B5A3 is a 5.5-inch PanelView Standard operator terminal that combines keypad and touchscreen input with a monochrome display for local HMI on factory floors. This AC-powered unit accepts 85–264 VAC (47–63 Hz) and is designed to work with Rockwell Automation controllers such as SLC 500, PLC-5, and MicroLogix, communicating via DH-485 by default and, with the appropriate interface modules, DF1 full-duplex, Remote I/O, or DeviceNet. It offers 240 KB nonvolatile memory and 170 KB RAM for screen data and small application logic, supporting modest alarm logs, data entry, and screen navigation. An RS-232 printer port enables local printouts of reports or alarms. The 2711-B5A3 is part of the PanelView 550 family, a compact operator interface intended for machine control panels, line monitoring, and operator input in mid-sized automation schemes. Common applications include displaying process data, acknowledging alarms, entering numeric values, and navigating a screen-based interface on legacy PLC networks, making it a practical choice for retrofit projects or new installations that still rely on DH-485 or DF1 communications within an Allen-Bradley ecosystem.